iPhone 5S Continues Reign as Top Selling Smartphone in the U.S.
iPhone 5S remains the best selling smartphone at every major carrier in the U.S. by a significant margin.
iPhone 5S Surpasses Galaxy S4 Sales At US Carriers In Just Two Weeks
Apple's iPhone 5S has already overtaken the Samsung Galaxy S4 to become the top-selling smartphone at all four major carriers in US.